Quarter	Percent, Seasonally Adjusted
1998-04-01	47.6625750848786
1999-04-01	47.5486381322957
2000-04-01	48.7426974853950
2001-04-01	45.5467590301831
2002-04-01	46.7714631197098
2003-04-01	44.5672624647225
2004-04-01	44.0421631530706
2005-04-01	42.3059668012562
2006-04-01	41.4081408140814
2007-04-01	39.6517954298150
2008-04-01	38.3853606027987
2009-04-01	39.0217855617258
2010-01-01	40.6695431622949
2010-04-01	40.8034615704099
2010-07-01	41.8006093030260
2010-10-01	40.7800533782623
2011-01-01	39.6841814262503
2011-04-01	39.2901381543475
2011-07-01	39.9964897606620
2011-10-01	38.5486887668382
2012-01-01	38.6726454950593
2012-04-01	37.6508161834851
2012-07-01	37.9941000370659
2012-10-01	38.3140923830567
2013-01-01	36.8271240315050
2013-04-01	35.9289456673713
2013-07-01	36.9370691850531
2013-10-01	37.2147193000700
2014-01-01	36.8745272494745
2014-04-01	34.9501204714866
2014-07-01	35.9709638243823
2014-10-01	35.7347474460778
2015-01-01	34.8088140496263
2015-04-01	34.3741974713880
2015-07-01	33.2773801997937
2015-10-01	32.5819105691277
2016-01-01	32.3336832309812
2016-04-01	31.4938100869578
2016-07-01	32.5261390519148
2016-10-01	31.9643806580017
2017-01-01	33.0476441884998
2017-04-01	32.0392628661607
2017-07-01	31.9208155642382
2017-10-01	30.8802507256642
2018-01-01	30.8280338719663
2018-04-01	30.8333639919719